DetPass: determinant of the matrix

In BMhyd: PCM for Hybridization

Description

Calculate the determinant of the matrix and check whether it is positive.

Usage

	DetPass(phy)
	

Arguments

phy	an object of class 'phylo'

Details

This functon first calculates variance covariance matrix C for the tree. It then calculates the determinant of the C, 0.0001*C, and 1000*C and verifies whether all the three determinants are positive and finite. If yes, a TRUE value is return and the C matrix is good for further use.

Value

a TRUE/FALSE value.

Author(s)

Brian O'Meara, Dwueng-Chwuan Jhwueng.

References

Jhwueng D.C. and O'Meara B.C. 2015. Studying trait evolution in hybrid species on phylogenetic networks. Submitted.

Examples

	library(ape)
	##simulate a tree of 5 taxa
	phy<-rtree(5)
	#check whether the determiant is positve
	DetPass(phy)
	

BMhyd documentation built on May 2, 2019, 8:27 a.m.